A bullet is fired from a gun, the force on the bullet is given by \(F = 600- 2 \times 10^{5} t\) where \(F\) is in newton and \(t\) in second. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?
1
\(9\ N-s\)
2
\(0\)
3
\(0.9\ N-s\)
4
\(1.8\ N-s\)